<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        div {
            background-color: red;
            width: 200px;
            height: 100px;
            border-radius: 100px 100px 0 0;
            box-shadow: inset -10px 10px 10px blue;
        }

    </style>
</head>
<body>
<div>

</div>
</body>
</html>